I recently purchased a NIB G22 Gen 2. Serial # range BBL. Stripping it down for cleaning prior to shooting it, found the coil trigger spring to be a shiney bronze color. I have never seen one like this before and have been an armorer for 12 years. Anyone know about this spring? I went ahead and replaced it with the matte grey new coil spring although have not hit the range with it yet. Thanks in advance.